Electrolyte motion induced salt inhomogeneity – a novel aging mechanism in large-format lithium-ion cells

Solchenbach, Sophie; Tacconis, Camilla; Gomez Martin, Aurora; Peters, Verena; Wallisch, Lea; Stanke, Anna; Hofer, Johanna; Renz, Diemo; Lewerich, Burkhard; Bauer, Georg; Wichmann, Moritz; Goldbach, Daniel; Adam, Alexander; Spielbauer, Markus; Lamp, Peter; Wandt, Johannes

doi:10.1039/d4ee03211j

Energy Environ. Sci.

2024

DOI: 10.1039/d4ee03211j

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Electrolyte motion induced salt inhomogeneity – a novel aging mechanism in large-format lithium-ion cells

Sophie Solchenbach,

Camilla Tacconis,

Aurora Gomez Martin

et al.

Abstract: Electrolyte motion induced salt inhomogeneity (EMSI): during cycling, electrolyte moves into and out of the jelly roll, which leads to a lasting in-plane LiPF6 concentration gradient, possibly causing secondary effects like localized lithium plating.

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Cited by 2 publications

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Lithium trapping induced memory effect of Gr/SiOx blend anodes in lithium-ion batteries subjected to repeated partial cycling

Knorr,

Hsiao,

Adam

et al. 2025

Journal of Power Sources

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Lithium trapping induced memory effect of Gr/SiOx blend anodes in lithium-ion batteries subjected to repeated partial cycling

Knorr,

Hsiao,

Adam

et al. 2025

Journal of Power Sources

View full text Add to dashboard Cite

Addressing Limitations of the Endpoint Slippage Analysis

Rodrigues

2024

J. Electrochem. Soc.

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Some rate of oxidation and reduction side-reactions will inevitably coexist in most rechargeable batteries, contributing to reversible and irreversible self-discharge. While parasitic reduction traps electrons, parasitic oxidation donates electrons to the cell’s inventory and can lead to temporary capacity gain. This causes direct capacity measurements to be an unreliable source of information about the total extent of side-reactions occurring. The most widely used method to determine the rate of these two types of parasitic processes involves analyzing the slippage of endpoints Here, we argue that this approach could lead to inaccuracies when applied to certain systems, which includes Si electrodes in Li-ion batteries and hard carbon in Na-ion batteries. This inaccuracy originates from the smooth nature of the voltage profiles of these materials at low and high alkali-ion content, causing the termination of charge and discharge to be dictated by voltage changes at both the positive and negative electrodes. We analyze this issue in quantitative terms and propose equations that can provide true rates of parasitic processes from experimental endpoint slippage data. This work shows that, in battery science, well-established analytical approaches may not be directly transferrable to new electrode systems.

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Electrolyte motion induced salt inhomogeneity – a novel aging mechanism in large-format lithium-ion cells

Abstract: Electrolyte motion induced salt inhomogeneity (EMSI): during cycling, electrolyte moves into and out of the jelly roll, which leads to a lasting in-plane LiPF6 concentration gradient, possibly causing secondary effects like localized lithium plating.

Cited by 2 publications

References 57 publications

Lithium trapping induced memory effect of Gr/SiOx blend anodes in lithium-ion batteries subjected to repeated partial cycling

Lithium trapping induced memory effect of Gr/SiOx blend anodes in lithium-ion batteries subjected to repeated partial cycling

Addressing Limitations of the Endpoint Slippage Analysis

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